During war against US-backed rebels (Contras) Fuerza Aérea Sandinista lost number planes and helicopters. According to last official Nicaragua Air Force historical release in period between 1979 and 1990 there were shot down 11 aircrafts (including 2 Mi-25) and 6 more crashed due to non combat reasons. 43 crewman and 61 military persons aboard were killed.
Conras rebels also lost number of aircrafts:
Incidents before Somoza regime fall: